期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 13, 页码 -出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta12550d
关键词
-
This study reported three new oxychlorides with enhanced photocatalytic activity as the number of perovskite layers increased.
Sillen-Aurivillius layered oxyhalides with single-, double- and triple-perovskite slabs (n = 1-3) are promising visible-light-driven photocatalysts for water splitting with different behaviors observed depending on n. However, there was no report on the photocatalytic activity of n >= 4 phases. Here, we report three new oxychlorides BaBi5Ti3O14Cl, Ba2Bi5Ti4O17Cl and Ba3Bi5Ti5O20Cl, respectively, with triple-, quadruple- and quintuple-perovskite layers. The synthesis of these phases involves a bricklaying synthesis, where a plain perovskite, BaTiO3, a Sillen phase, BaBiO2Cl, and Aurivillius phases Bi4Ti3O12, BaBi4Ti4O15, and Ba2Bi4Ti5O18 were used as building blocks. The present Sillen-Aurivillius oxychlorides have appropriate valence and conduction band levels for visible-light-induced water splitting. DFT calculation for BaBi5Ti3O14Cl (n = 3) and Ba3Bi5Ti5O20Cl (n = 5) indicates that their valence and conduction bands are separated spatially on the perovskite and fluorite layers, respectively. The photocatalytic activity of the three Sillen-Aurivillius oxychlorides is enhanced with increasing the number of the perovskite layers.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据